"Rihanna is a no go ... I do not understand how to bring the core brand of Nivea in conjunction with Rihanna" Nivea's new CEO, Stefan Heidenreich, told the German paperWelt. He explained, "Nivea is a company which stands for trust, family and reliability."

The singer had posed for Nivea's 100th birthday, but apparently the "skincare for life" that was written on her poster didn't apply to her contract.

If it makes her feel any better, Rihanna certainly isn't the first huge celebrity to be kicked out of a brand ambassador role. From seedy drug scandals to openly not wearing makeup (when being the face of a cosmetics brand), here are the biggest celebrity-brand break-ups.

Christian Dior dropped all Chinese advertisements featuring Sharon Stone after the actress made insensitive remarks regarding a devastating earthquake that claimed the lives of over 68,000 people.

"They're not being nice to the Dalai Lama, who is a friend of mine," Stone said. "And then all of this earthquake and all this happened and I thought, is that karma? When you're not nice, that bad things happen to you?"

Don't you love karma?

Dumper: Hertz, 1992. Dumpee: O.J. Simpson was dumped even before the murder trial.

Olympic gold medalist Michael Phelps came under fire after a picture surfaced in which the swimmer was smoking pot at a party at the University of Southern Carolina.

Two of his deals with AT&T and Rosetta Stone ended on December 31 and neither company decided to renew his contract. "We do not condone his activities and are disappointed in his recent judgment," a statement issued by Rosetta Stone read.

Other brands didn't care about Phelps' bong. Subway went so far as to have Phelps star in an ad titled "Be Yourself."

Sidenote: The 22 time gold medalist seems to have recovered pretty well.

Dumper: Pepsi, 1998. Dumpee: Madonna, for gyrating against a cross.

At the peak of the cola wars in 1989, PepsiCo decided to fight the fire of Coca-Cola's celebrity laden ad blitz with fire and gave Madonna a one-year contract to star in a series of Pepsi commercials and a concert tour.

Paying the actress over $5 million to use her new song -- "Like a Prayer" -- in the spot, Pepsi premiered the commercial to almost 250 million people during a broadcast of "The Cosby Show."

While the ad itself was PG, Madonna's music video for the song in which she witnesses a rape and gyrates around a burning cross incited an explosion of controversy. (Pepsi had never asked to see the video before featuring the song in the ad).

Catholic bishop from Texas, Rene Gracido asked for a boycott not only of Pepsi but of its holdings as well, including Taco Bell, KFC, and Pizza Hut. Less than a month later, Pepsi pulled the spot.

Dumper: Priceline, 2012. Dumpee: William Shatner, for being too good at his job.

Why are Priceline execs sending Shatner to his fiery demise? It turns out that Priceline is replacing the bid-based travel booking site to a fixed price model, so they had to do something big and drastic to make viewers notice the change... a change that they could never understand if the Negotiator were still alive.

Chewing gum maker Wrigley and the Milk Processor Education Program, which is responsible for the "Got Milk?" campaign, ended their contracts with R&B performer Chris Brown after the singer pleaded guilty for assaulting his former girlfriend, Rihanna.

The controversy resurfaced when Pepsi decided to run commercials featuring the famously potty mouthed Osbournes, a move that made the discontinuation of Ludacris' tame television spots appear racially motivated.

Dumper: Go Daddy, 2012. Dumpee: Danica Patrick, for being too much of a Go Daddy Girl.

In June 2012, Go Daddy—which has become known for its high-on-cleavage, low-on-content ads—decided to change its image to be more conservative and technology oriented. This involved hiring an ad agency (Deutsch) to do its Olympics commercials and ditching long-time Go Daddy girl, Danica Patrick.

Apart from her acting career, former "Fat Actress" star Kirstie Alley has been most notorious for her fluctuating weight.

Alley ended her three-year stint as a Jenny Craig spokesperson in 2008 with the claims that she had kept her 75-pound weight loss steady for over a year and was ready to give other spokeswomen, Valerie Bertinelli and Queen Latifah, a shot.

True or false, Alley appeared on "Oprah" two months later to apologize for regaining all the weight. Jenny Craig released the statement:

Jenny Craig maintains a friendly relationship with Kirstie and we are proud of her accomplishments while she was on our program. Kirstie successfully lost 75 lbs and maintained that weight loss throughout our three year relationship, which came to an end in December 2007. We remain supportive of Kirstie, wish her nothing but the best and we would welcome her back at any time as a returning client.

Baldwin and his mother, a loyal customer, had been featured in a Wegmans commercial that the supermarket decided to pull after Baldwin refused to turn his cell phone off during a flight's takeoff earlier last winter. The actor not only fought with flight attendants until he was escorted off the plane, but he then Tweeted about his experience. Wegmans said that numerous customers called to complain about the incident.

But the ban was short-lived. Wegmans decided to re-air the commercial after the grocery store received hundreds of emails, tweets, and angry calls.

Even though Barkley could have meant that it was a scam to get paid so much to lose weight (and not that the weight loss program itself was a scam), it was still a bad move. Still Weight Watchers took the flub lightly, releasing the statement, "We love Charles for the same reason everyone loves Charles, he's unfiltered...We agree that being a spokesman for Weight Watchers is a pretty great gig."